Mold disk for typographical machines



Jul 13 1926.

S. E. SPERRY I MOLDDISK FOR TYPOGRAPHICAL MACHINES Filed April 2, 1925lllllllllllllllal;

INVENTOR.

Jamue/jZJjwr L ll llllllllillilllllllllllll V q 'yw/ 7 i 7 ATTORNEY.

Patented July 13, 1926.

UNITE-D STATES PATENT OFFICE.

SAMUEL E. SPERRY, OF WOODHAVEN, NEW YORK, ASSIGNOR IO INTERTYPE OOR-PORA'IION, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

MOLD DISK FOR TYPOGRAPHICAL MACHINES.

Application filed April 2, 1925, Serial No. 20,261.

the mold disk is strengthened or reinforced so that it effectuallyresists stresses exerted thereon incident to the operation of themachine and which tend to distort it and to displace the mold parts. 7

Heretofore it'has been the practice, in.

typographical machines of the linotype class, to secure the mold cap andliners in proper relation to the mold body by clamping screws whichengage the ends of the mold cap, and in order to prevent outwardspringing of the middle of the mold cap, setscrews have been employedwhich were fitted into the peripheral portion of the mold disk andabutted against the mold cap intermediately of its length. However, inorder to apply the molds to the mold disk, peripheral portions of themold disk have been cut away to accommodate the molds, and in attemptingto apply four molds to the mold disk in order to increase the range ofuseful-c ness of the machine to meet demands, it has been found that thecutting away of the mold diskto accommodate such a number ofmolds'weakens the mold disk to such an extent that the supportafforded-the setscrews is not sufliciently rigid to secure to hold themold cap and liners firmly in place, and the consequent weakening of themold disk renders it subject to strain and distortion under the stressesimposed upon it incident to the ejection of the cast slugs from themold, and other operations of'the machine. v

The present invention provides a mold disk which enables four molds tobe applied thereto and the caps and liners thereof firmly and securelyheld in place, and it enables the mold disk to effectually withstand thestresses imposed thereon without strain or distortion.

To these and other ends, the invention consists in certain improvementsand combinations and arrangements of parts, all as will be hereinaftermore fully described, the features of novelty being pointed outparticularly in the claims at the end of the specification.

In the accompanying drawing Figure 1 is a face view of a mold diskadapted for use in typographical machines of the linotype class, themold disk being constructed in accordance with the preferred embodimentof the present invention;

Figure 2 represents asection taken on the line 2-2 of Figure 1; and

Figure 3 represents a cross-section taken radially through the rim ofthe mold disk and showing another embodiment of the invention.

j The present invention provides a mold disk which enables the parts ofthe mold or molds thereon to be held in place with great er securitythan heretofore and it provides a mold disk which is reinforced orstrengthened so that it is enabled to withstand stresses imposed upon itsubstantially without strain or distortion. The improved mold disk maybe employed as a carrier for one or more molds, but the mold disk isparticularly useful where a largenumber of molds, three or four forexample, are to be employed. The preferred embodiment of the inventionis shown in the accompanying drawing and will be hereinafter describedin detail, but it is to be understood that the invention is notrestricted to theprecise construction shown, as equivalent constructionsare contemplated and such will be included within the scope of theclaims.

- In the present instance, the mold disk comprises a hub 1 which may beadapted to be mounted for rotation on the forward end of the mold slidesuch as that commonly employed in machines of the linotype class; 2designates the web portion of themold disk, and 3 designates the rim ofthe disk which is usually provided with gear teeth 4: which in machinesof the linotype class mesh with a pinion which serves to rotate the molddisk at appropriate periods in the operation of the machine to bring themold which is in use to the casting point, and after the cast has beenmade, to carry the mold containing the slug cast therein to the ejectingposition where an ejector operates on the slug to eject it from themold, after which the mold disk rotates to restore the mold to thecasting position.

The molds are mounted on theface of the mold disk, each mold usuallycomprising a body 5, liners (S which determine the thickness and lengthof the slug to be cast in the mold, and a cap 7 which rests on theliners and closes the top of the mold cavity. A portion of the moldbodyand the mold cap are usually let into a recess 8 which is formed inthe peripheral portion of the web 2 of the disk. The body of each moldis rigidlyfixed to the disk as by screws 9 but the mold cap 7 and theliners 6 are removable so that liners of different thickness or ofdifferent lengths may be interposed between the mold body and cap, toaccord with the thickness and length of the type bars slugs to be castin the mold.

Usually the mold cap, liners amimold bodies have been held altogether orin proper relationship by clamping screws at the ends of the body andcap, and in order to hold the mold cap, liners and mold body fromoutward displacement under the forcesapplied incident to the ejecting'orother operation of the machine, Compression screws have been fittedin theouter or peripheral portion of the disk to bear at their innerends against the top of the mold cap, substantially as shown, forexample, in the patenc o T. S. Homans, l\ o. 1,116,279, granted November3, 1914, such screws being adjustable so that liners of difi'er'entthicl rnesse's could be accommodated between the mold 'cap and bodylandthus permit other liners to be substituted; and in using such screwsin mold disks to which only 'oneor two molds were applied, thesecompression screws could he set up with'sufiicient pressure against thetop of the mold cap to firmly hold the cap and liners in fixed relationto the niold body. However, it has been found that if suchcompression'screws were applied to a mold disk of the kind usuallyemployed in machines of the linotype class and to which a large mainherof 1nold's, fo 1 r for example, has been applied, the portions theperiphery of the disk through which these screws pass would becomestrained and distorted as a result of the outward reaction frointhepressure of the screws and of the stresses imposed upon the mold andtending to displace the mold cap outwardly incident to the ejection ofthe cast slug from themold during the operation of the machiiie, owingto the cutting away and consequent weakenin'gof the mold disk inadapting itto receive such a number of molds, and hence, the screwswould fail to lock the mold cap and liners in place with the requisiterigidity to insure the 1n'ainte nance of the correct relationshipbetween the component parts of the mold.

The present invention provides a rein forcement for the mold diskwhereby it is enabled to effectively resist or sustain the reactionproduced by the firm setting up of the compression screws against themold cap and to withstand stresses imposed upon the mold during theejecting or other operations of the machine, and which tend to displacethe mold cap outwardly or to dis "tort the disk. This reinforcementcomprises a circumferentially continuous band which rencircles the rimof the disk and provides a substantially distortionless support for themold securing'screws. Preferably, and as shown in the present instance,thereinforcemerit Comprises a band 11 composed or steel or other metalor material possessing the requisite strength, this steel band beingshrunk or forced onto the disk with suflicient firmness to become aunitary part of the disk, and an edge of the band overhangs the caps ofthe molds so that the overhanging portion may receive the screws 9 andand position these screws so that they will hear on the tops of themold'c'aps', In applying a'reinfor'cing band to the mold d i sk,'th'elatter may be constructed in the usual way except that about one-half ofthewidth of the gear or driving teeth 4; are omitted or cut away toprovide a recess 12 which surroiin'ds the rim of the disk and provides aseat for the reinforcing bant. It will be understood that the width ofthe teeth on the tisual driv in'g pinion which meshes with theperipheral gear teeth 4 of the mold disk will be correspondingly reducedto conform substantially with the rethiced width of the teeth 4 and tothus provide clearance for'the reinforcing band 11. By properlyproportioning the in terior bore ofvthe reinforcin'g band 1 1 and thediameter of the recess or seat 12 topicduc'e tension npon thereinforcing band as the result of tl'ieshrinking or forcing of this bandupon the disk, the outward reaction preduced on the compression screws 9and 10 while locking or clan'iping the mold cap and liners in place willbeeiiectu'ally resisted by the contracting tendency of the reinforcingband, and furthermore, the reinforcing band'which, inefiect, becomes apart of the rim of the mold disk adds stiffness "and strength theretoand thereby pre\ *ei1t's strain or distortion of the mold disk, which isusnally composed of cast iron, under the stresses which are applied toit during the ejection of the slugs or other operations of the machine.Instead of constructing the reinforcing band as a separate part andapplying it to the mold disk, this reinforcing band may be cast orotherwise formed'as an integral part of the rim of the mold disk asshown in Fig. 3, and in that case, the increased thickness of theportion of the mold disk rim occupied by the reinforcing band designated11 will provide a support of sufficient strength and rigidity for themold cap compression screws, and it will stiffen the rim sufficiently toresist forces tending to strain or distort the mold disk. Where thereinforcing band is cast or formed as an integral part of the mold disk,the gear teeth P on the periphery of the disk may be milled insubstantially the usual way except that they would be of reduced Width,as is the case where the separately formed rein forcing band is appliedto the disk, and the gear teeth would run out instead of through theintegrally formed reinforcing hand, substantially as shown in Fig. 3.

By providing the rim of the mold disk with a circumferentiallycontinuous or uninterrupted band, a part of which lies in the plane ofor overhangs the top of the mold cap, and threading the mold capcompression screws through this overhanging part of the band, thecompression screws may be set up to the extent required to lock the moldcap and liners to the mold body with sufiicient firmness to resistforces tending to displace the cap, as the reinforcing hand serves toeifectiveiy sustain. the reaction of the screws so that the mold diskwill not become distorted in consequence of such reaction; and thestiifenim effect of the reinforcing band will strengthen the rim orperipheral portion of the mold disk sufficiently to enable it tosustain, without strain or distortion, the stresses imposed upon itincident to the ejection of the cast slug from the mold or any of theother usual operations which take place.

The invention is especially useful as a means to enable a large numberof molds, three or four, for example, to be employed on the mold disk,as it adds to the mold disk sufiicient strength and rigidity to offsetthe substantial weakening of the disk by the cutting away thereof toaccommodate such a large number of molds, but the invention may also beutilized as a means for sustaining the reaction of the mold capcompression screws and for preventing distortion of the mold disk underthe strains imposed upon it when one or more molds are used.

I claim as my invention 1. A mold disk for typographical machines havingdriving teeth which occupy a part of the width 'of its rim and acircumferentially-continuous reinforcing band which encircles its rimand occupies another portion of its width.

2. A mold disk for typographical machines having driving teeth whichoccupy a part of the width of its rim, said driving teeth being cut awayto form a recess which occupies another part of the rim, and an encircling reinforcing band seated in said recess.

3, A mold disk for typographical machines having a mold set in its faceand having a circumferentially-continuous reinforcing band whichencircles the outer periphery of its rim and part of which overhangs themold, and mold-locking means supported by the overl'ianging part of saidband.

4. A mold disk for typographical machines having a mold recessed in itsface and having a circumferentially-continuous reinforcing handencircling the outer periphery of its rim, part of said band occupying aposition opposite to the mold cap, and moldlocking screws fitted in saidpart of the band and bearing against the mold cap.

5. A mold disk for typographical maciiines having a mold recessed in itsface and having driving teeth occupying part of the width of its rim,said teeth being cut away to form an encircling recess which occupiesanother part of the width of the rim, a circumferentially-continuousband seated in said recess, part of said band overhanging the top of themold, and mold lock-i ing means supported by said overhanging part ofthe band.

6. A mold disk for typographical machines having a mold on its face, andhaving a reinforcing band, a portion of the width vof which overhangsthe top of the mold and extends continuously around the outer side ofthe circumference of the rim of the disk, and mold locking meanssustained by the overhanging portion of the band and operative to exertinward compression on the 7 cap of the mold.

In testimony whereof I have hereunto set my hand.

SAMUEL E. SPERRY.

